Question

В партии , состоящей из 1000 бытовых насосов , 30 насосов оказались неисправ - ными . Какова вероятность того , что случайно взятый из этой партии насос исправен ?

Answer 1

1000-30=970 исправных насосов
970/1000=0,97 вероятность что возьмут исправный насос

Answer 2

Calculating the Probability of Selecting a Functional Pump

To calculate the probability of randomly selecting a functional pump from a batch of 1000 pumps, we can use the following formula:

Probability (P) = Number of functional pumps / Total number of pumps

Given that 30 pumps are faulty, the number of functional pumps can be calculated as: Number of functional pumps = Total number of pumps - Number of faulty pumps

Let's calculate the probability using the provided information.

Calculation

The total number of pumps = 1000 Number of faulty pumps = 30 Number of functional pumps = 1000 - 30 = 970

Now, we can calculate the probability: Probability (P) = 970 / 1000 = 0.97

Therefore, the probability of randomly selecting a functional pump from this batch is 0.97 or 97%.